LT1166CS8 datasheet(4/16 Pages) LINER

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LT1166

TYPICAL PERFORMANCE CHARACTERISTICS

SUPPLY VOLTAGE (V)

0.120

0.110

0.100

0.090

0.080

–0.080

–0.090

–0.100

–0.110

–0.120

LT1166 • TPC10

135

VIN = ±200mV

RL = 0

RIN = 0

125

°C

–55

°C

125

°C

–55

°C

gmCC

gmEE

Input Transconductance vs

Supply Voltage

LOAD CURRENT (mA)

864202468

LT1166 • TPC12

1000

100

RSENSE = 100Ω

VBOTTOM

VTOP

SINKING

SOURCING

Sense Pin Voltage Referenced to

VOUT vs Load Current

FREQUENCY (kHz)

0.1

0.01

100

LT1166 • TPC11

0.01

0.1

RL = 10Ω

PO = 1W

SEE FIGURE 8

Total Harmonic Distortion vs

Frequency

PIN FUNCTIONS

VTOP (Pin 1): Pin 1 establishes the top side drive voltage

for the output transistors. Operating supply current enters

Pin 1 and a portion biases internal circuitry; Pin 1 current

should be greater than 4mA. Pin 1 voltage is internally

clamped to 12V with respect to VOUT and the pin current

should be limited to 75mA maximum.

VIN (Pin 2): Pin 2 is the input to a unity gain buffer which

drives VOUT (Pin 3). During a fault condition (short circuit)

the input impedance drops to 200

Ω and the input current

must be limited to 5mA or VIN to VOUT limited to less than

±6V.

VOUT (Pin 3): Pin 3 of the LT1166 is the output of a voltage

control loop that maintains the output voltage at the input

voltage.

VBOTTOM (Pin 4): Pin 4 establishes the bottom side drive

voltage for the output transistors. Operating supply cur-

rent exits this pin; Pin 4 current should be greater than

4mA. Pin 4 voltage is internally clamped to – 12V with

respect to VOUT and the pin current should be limited to

75mA maximum.

SENSE – (Pin 5): The Sense – pin voltage is established

by the current control loop and it controls the output

quiescent current in the bottom side power device. Limit

the maximum differential voltage between Pin 5 and Pin 3

±6V during fault conditions.

ILIM

– (Pin 6): The negative side current limit, limits the

voltage at VBOTTOM to VOUT during a negative fault condi-

tion. The maximum reverse voltage on Pin 6 with respect

to VOUT is 6V.

ILIM+ (Pin 7): The positive side current limit, limits the

voltage at VTOP to VOUT during a positive fault condition.

The maximum reverse voltage on Pin 7 with respect to

VOUT is –6V.

SENSE + (Pin 8): The Sense + pin voltage is established by

the current control loop and it controls the output quies-

cent current in the top side power device. Limit the

maximum differential voltage between Pin 8 and Pin 3 to

±6V during fault conditions.

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